:root {
  --bg: #eef0f5;
  --panel: #ffffff;
  --panel-2: #f2f3f8;
  --border: #e1e3ee;
  --text: #1a1c26;
  --muted: #687087;
  --accent: #7c5cff;
  --accent-2: #6a4df2;
  --danger: #e0445c;
  --vp-a: #e4e7f2;
  --vp-b: #eef0f5;
  --checker-a: #dcdfe9;
  --checker-b: #f5f6fa;
  --stage-shadow: 0 16px 50px rgba(28, 33, 60, 0.20), 0 0 0 1px var(--border);
  --track: #dcdfeb;
  --thumb-border: #ffffff;
  --radius: 10px;
  font-size: 14px;
}

[data-theme="dark"] {
  --bg: #0b0c10;
  --panel: #13151b;
  --panel-2: #181b23;
  --border: #242836;
  --text: #e9ebf2;
  --muted: #8a90a3;
  --accent: #7c5cff;
  --accent-2: #9d7bff;
  --danger: #ff5c6c;
  --vp-a: #15171f;
  --vp-b: #0b0c10;
  --checker-a: #23252e;
  --checker-b: #181a21;
  --stage-shadow: 0 18px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--border);
  --track: #2a2e3d;
  --thumb-border: #0e0f14;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

#bootError {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  max-width: 480px;
  padding: 12px 18px;
  background: var(--danger);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 10px;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.35);
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */

header {
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.2px;
  color: var(--text);
  white-space: nowrap;
}
.brand svg { color: var(--accent-2); }
.brand em { font-style: normal; color: var(--accent-2); }

.header-center { display: flex; align-items: center; gap: 8px; }
.header-right { display: flex; align-items: center; gap: 8px; }

.seg {
  display: flex;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  gap: 3px;
}
.seg button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 6px;
  cursor: pointer;
}
.seg button.active { background: var(--accent); color: #fff; }
.seg button:not(.active):hover { color: var(--text); }

button.primary, button.ghost {
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  padding: 7px 14px;
  cursor: pointer;
  border: 1px solid var(--border);
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { filter: brightness(1.08); }
button.ghost {
  background: var(--panel-2);
  color: var(--text);
}
button.ghost:hover { border-color: var(--accent); }
button.ghost.danger { color: var(--danger); }
button.ghost.wide { flex: 1; }
button.ghost.icon { padding: 7px 9px; line-height: 0; }
button:disabled { opacity: 0.5; pointer-events: none; }

.theme-icon-sun { display: none; }
.theme-icon-moon { display: inline; }
[data-theme="dark"] .theme-icon-sun { display: inline; }
[data-theme="dark"] .theme-icon-moon { display: none; }

select {
  font: inherit;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
}

.export-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* one consistent control height + radius across the whole top bar */
.header-right { gap: 12px; }
header select,
header button.primary,
header button.ghost {
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-top: 0;
  padding-bottom: 0;
  border-radius: 8px;
}
header select { padding-left: 10px; padding-right: 8px; }
header .seg {
  height: 34px;
  align-items: center;
}
header .seg button {
  height: 26px;
  display: inline-flex;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

/* ---------- layout ---------- */

main {
  display: grid;
  grid-template-columns: 232px 1fr 282px;
  /* pin the single row to the available height so tall side panels
     scroll internally instead of pushing the timeline off-screen */
  grid-template-rows: minmax(0, 1fr);
  height: calc(100vh - 54px);
}

#center {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
#center #viewport { flex: 1; min-height: 0; }

.panel {
  background: var(--panel);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.panel.left  { border-right: 1px solid var(--border); }
.panel.right { border-left: 1px solid var(--border); }

.section { padding: 14px 14px 10px; border-bottom: 1px solid var(--border); }
.section.grow { flex: 1; }
.section.help p { color: var(--muted); font-size: 12px; line-height: 1.7; margin: 0; }

h2 {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
}

.hint { color: var(--muted); font-size: 12.5px; line-height: 1.5; }

/* ---------- device library ---------- */

.lib-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.lib-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  padding: 12px 6px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}
.lib-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.lib-card:active { transform: translateY(0); }
.lib-card svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: var(--accent-2);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- scene list ---------- */

.device-list { display: flex; flex-direction: column; gap: 5px; }
.device-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 500;
}
.device-item:hover { border-color: var(--accent); }
.device-item.active { border-color: var(--accent); background: rgba(124, 92, 255, 0.10); }
.device-item .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  border: 1px solid rgba(0, 0, 0, 0.12);
  flex: none;
}
.device-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.device-item .x {
  border: 0; background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
}
.device-item .x:hover { color: var(--danger); }

/* ---------- viewport ---------- */

#viewport {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(1200px 700px at 50% 20%, var(--vp-a) 0%, var(--vp-b) 70%);
  overflow: hidden;
  padding: 26px;
}

#stage {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--stage-shadow);
}
#stage.checker {
  background-image:
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%, transparent 75%, var(--checker-a) 75%),
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%, transparent 75%, var(--checker-a) 75%);
  background-color: var(--checker-b);
  background-size: 22px 22px;
  background-position: 0 0, 11px 11px;
}
#stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
#bgLayer, #overlay { pointer-events: none; }
#gl { touch-action: none; }

#txtContent {
  width: 100%;
  font: inherit;
  font-size: 12.5px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 9px;
  resize: vertical;
  min-height: 44px;
  margin-top: 2px;
}

#emptyHint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  pointer-events: none;
  text-align: center;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
}
#emptyHint p { margin: 0; font-size: 17px; font-weight: 700; }
#emptyHint span { font-size: 13px; opacity: 0.85; }

#dropHint {
  position: absolute;
  inset: 10px;
  border: 2px dashed var(--accent);
  border-radius: 10px;
  background: rgba(124, 92, 255, 0.14);
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}
#stage.dropping #dropHint { display: flex; }

/* ---------- property rows ---------- */

.row {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 8px 0;
}
.row.btns { gap: 8px; }
.row label {
  width: 52px;
  flex: none;
  font-size: 11.5px;
  color: var(--muted);
  font-weight: 600;
}
.row .val {
  width: 44px;
  flex: none;
  text-align: right;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.row select { flex: 1; min-width: 0; }

input[type="range"] {
  flex: 1;
  appearance: none;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--track);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--thumb-border);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--thumb-border);
  cursor: pointer;
}

input[type="color"] {
  width: 34px; height: 26px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-2);
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 4px; }

.chips { display: flex; gap: 5px; flex: 1; flex-wrap: wrap; }
.chips .chip {
  font: inherit;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  cursor: pointer;
}
.chips .chip:hover { border-color: var(--accent); color: var(--text); }
.chips .chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.chips .chip.custom:not(.active) { border-color: var(--accent-2); color: var(--accent-2); }

.swatches { display: flex; gap: 6px; flex: 1; }
.swatches button {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(127, 127, 127, 0.45);
  cursor: pointer;
  padding: 0;
}
.swatches button:hover { transform: scale(1.15); }

/* ---------- export overlay ---------- */

#exportOverlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 12, 24, 0.55);
  backdrop-filter: blur(3px);
}
.export-card {
  width: 320px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.35);
}
.export-card h3 { margin: 0 0 14px; font-size: 15px; }
.export-card .bar {
  height: 8px;
  border-radius: 4px;
  background: var(--track);
  overflow: hidden;
}
#exportFill {
  height: 100%;
  width: 0%;
  border-radius: 4px;
  background: var(--accent);
  transition: width 0.15s linear;
}
#exportStatus { color: var(--muted); font-size: 12.5px; margin: 10px 0 14px; }

/* ---------- timeline ---------- */

#timeline {
  display: flex;
  align-items: stretch;
  gap: 10px;
  padding: 10px 14px 8px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  min-height: 78px;
  flex: none;
}
#timeline > button { align-self: center; }
#tlLabel {
  align-self: center;
  width: 92px;
  flex: none;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
#tlTrack {
  position: relative;
  flex: 1;
  min-width: 0;
  cursor: crosshair;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
#tlBlocks {
  position: relative;
  min-height: 22px;
  max-height: 124px; /* ~6 lanes, then scroll */
  overflow-y: auto;
  overflow-x: hidden;
  margin-bottom: 3px;
}
.tl-block {
  position: absolute;
  height: 17px;
  border-radius: 5px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 17px;
  padding: 0 7px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  cursor: grab;
  user-select: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}
.tl-block.entry { background: #18a394; }
.tl-block.cam { background: #d97a16; }
.tl-block.bgfx { background: #2779e0; }
.tl-block.light { background: #b8860b; }
.tl-block.sel { box-shadow: 0 0 0 2px var(--text); }
.tl-block:active { cursor: grabbing; }
#tlRuler {
  position: relative;
  height: 17px;
  flex: none;
}
.tl-tick {
  position: absolute;
  top: 0;
  width: 1px;
  height: 4px;
  background: var(--muted);
  opacity: 0.45;
}
.tl-tick.major { height: 7px; opacity: 0.8; }
.tl-lab {
  position: absolute;
  top: 7px;
  transform: translateX(-50%);
  font-size: 9.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.tl-lab.first { transform: none; }
#tlPlayhead {
  position: absolute;
  top: -2px;
  bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: var(--danger);
  border-radius: 1px;
  pointer-events: none;
}

/* ---------- animation list + editor ---------- */

.anim-list { display: flex; flex-direction: column; gap: 5px; margin-bottom: 8px; }
.anim-sub {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 6px 0 1px;
}
.hint.small { font-size: 11px; margin: 8px 0 0; }
.pp-item:disabled { opacity: 0.4; cursor: not-allowed; }
.anim-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}
.anim-item:hover { border-color: var(--accent); }
.anim-item.active { border-color: var(--accent); background: rgba(124, 92, 255, 0.10); }
.anim-item .when {
  margin-left: auto;
  color: var(--muted);
  font-weight: 500;
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
}
.anim-item .x {
  border: 0; background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
}
.anim-item .x:hover { color: var(--danger); }
#animEditor {
  margin-top: 10px;
  padding-top: 6px;
  border-top: 1px dashed var(--border);
}

/* ---------- preset picker ---------- */

#presetPicker {
  position: fixed;
  top: 64px;
  right: 296px;
  width: 300px;
  max-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
  z-index: 40;
}
.pp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 8px;
}
.pp-head h3 { margin: 0; font-size: 13.5px; }
.pp-head button { font-size: 15px; padding: 2px 9px; }
.pp-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px 14px 14px;
  overflow-y: auto;
}
.pp-group {
  grid-column: 1 / -1;
  margin-top: 6px;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.pp-item {
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 6px;
  cursor: pointer;
}
.pp-item:hover { border-color: var(--accent); }

/* ---------- scrollbars ---------- */

.panel::-webkit-scrollbar { width: 8px; }
.panel::-webkit-scrollbar-thumb { background: var(--track); border-radius: 4px; }
.panel::-webkit-scrollbar-track { background: transparent; }